Read unitcell from cif file in unitcell.py

[CharlesRmn]

def unitcell_from_cif(pars):
import re
regex_a = r'_cell_length_a\s+([\d.]+)'
regex_b = r'_cell_length_b\s+([\d.]+)'
regex_c = r'_cell_length_c\s+([\d.]+)'
regex_alpha = r'_cell_angle_alpha\s+([\d.]+)'
regex_beta = r'_cell_angle_beta\s+([\d.]+)'
regex_gamma = r'_cell_angle_gamma\s+([\d.]+)'
regex_space_group = r'_symmetry_space_group_name_H-M\s*'".*['"]'
with open(pars, 'r') as pars:
pars = pars.read()
cell = unitcell([
float(re.search(regex_a, pars).group(1)),
float(re.search(regex_b, pars).group(1)),
float(re.search(regex_c, pars).group(1)),
float(re.search(regex_alpha, pars).group(1)),
float(re.search(regex_beta, pars).group(1)),
float(re.search(regex_gamma, pars).group(1)),
],
re.search(regex_space_group, pars).group(1))
return cell